The company is not always legally authorised to sell flights on behalf of airlines. I booked Ryanair though Kiwi, thinking I was getting a great deal. The reality was I had a worried ½ an hour on the Ryanair website, re- registering the flight details because Kiwi hadn't used my email address to book the flight, and also a different booking reference. Took a while to skim through the Kiwi site to find the correct info, but had I not checked straight away, I would have potentially had to pay additional fees to Ryanair. My advice, if something looks too good to be true, it probably is. Book direct or with a more reputable cost cutting company.